Safe drinking water : information and practice when treatment of drinking water supplies is necessary /
Gorde:
| Formatua: | Liburua |
|---|---|
| Hizkuntza: | English |
| Argitaratua: |
Oxford :
Oxfam,
1978.
|
| Edizioa: | Rev. ed. |
| Gaiak: |
| Deskribapen fisikoa: | 17 p. : ill. ; 30 cm. |
|---|